<template>
  <el-menu :default-active="activeMenu" mode="horizontal" @select="handleSelect">
    <template v-for="(item,index) in topMenus">
      <el-menu-item :style="{'--theme':theme}" :index="item.path" :key="index" v-if="index<visibleNumber">
        <svg-icon :icon-class="item.meta.icon"/>{{getTranslatedTitle(item)}}</el-menu-item>
    </template>
    <!-- 顶部菜单超出数量折叠 -->
    <el-submenu :style="{'--theme':theme}" index="more" v-if="topMenus.length>visibleNumber">
      <template slot="title">{{getTranslatedTitle({meta:{title:'更多菜单'} })}}</template>
      <template v-for="(item,index) in topMenus">
        <el-menu-item :index="item.path" :key="index" v-if="index>=visibleNumber">
          <svg-icon :icon-class="item.meta.icon"/>{{getTranslatedTitle(item)}}</el-menu-item>
      </template>
    </el-submenu>
  </el-menu>
</template>
<script>
import { constantRoutes } from "@/router";
export default {
  data() {
    return {
      // 顶部栏初始数
      visibleNumber: 5,
      // 是否为首次加载
      isFrist: false,
      // 当前激活菜单的 index
      currentIndex: undefined
    };
  },
  computed: {
    theme() {
      return this.$store.state.settings.theme;
    },
    // 顶部显示菜单
    topMenus() {
      let topMenus = [];
      this.routers.map((menu) => {
        if (menu.hidden !== true) {
          // 兼容顶部栏一级菜单内部跳转
          if (menu.path === "/") {
              topMenus.push(menu.children[0]);
          } else {
              topMenus.push(menu);
          }
        }
      });
      return topMenus;
    },
    // 所有的路由信息
    routers() {
      return this.$store.state.permission.topbarRouters;
    },
    // 设置子路由
    childrenMenus() {
      var childrenMenus = [];
      this.routers.map((router) => {
        for (var item in router.children) {
          if (router.children[item].parentPath === undefined) {
            if(router.path === "/") {
              router.children[item].path = "/redirect/" + router.children[item].path;
            } else {
              if(!this.ishttp(router.children[item].path)) {
                router.children[item].path = router.path + "/" + router.children[item].path;
              }
            }
            router.children[item].parentPath = router.path;
          }
          childrenMenus.push(router.children[item]);
        }
      });
      return constantRoutes.concat(childrenMenus);
    },
    // 默认激活的菜单
    activeMenu() {
      const path = this.$route.path;
      let activePath = this.defaultRouter();
      if (path.lastIndexOf("/") > 0) {
        const tmpPath = path.substring(1, path.length);
        activePath = "/" + tmpPath.substring(0, tmpPath.indexOf("/"));
      } else if ("/index" == path || "" == path) {
        if (!this.isFrist) {
          this.isFrist = true;
        } else {
          activePath = "index";
        }
      }
      var routes = this.activeRoutes(activePath);
      if (routes.length === 0) {
        activePath = this.currentIndex || this.defaultRouter()
        this.activeRoutes(activePath);
      }
      return activePath;
    },
    currentLanguage() {
      return this.$store.getters.language || 'zh'
    }
  },
  watch: {
    // 监听语言变化，重新渲染组件
    currentLanguage() {
      this.$forceUpdate()
    }
  },
  beforeMount() {
    window.addEventListener('resize', this.setVisibleNumber)
  },
  beforeDestroy() {
    window.removeEventListener('resize', this.setVisibleNumber)
  },
  mounted() {
    this.setVisibleNumber();
  },
  methods: {
    // 根据宽度计算设置显示栏数
    setVisibleNumber() {
      const width = document.body.getBoundingClientRect().width / 3;
      this.visibleNumber = parseInt(width / 85);
    },
    // 默认激活的路由
    defaultRouter() {
      let router;
      Object.keys(this.routers).some((key) => {
        if (!this.routers[key].hidden) {
          router = this.routers[key].path;
          return true;
        }
      });
      return router;
    },
    // 菜单选择事件
    handleSelect(key, keyPath) {
      this.currentIndex = key;
      if (this.ishttp(key)) {
        // http(s):// 路径新窗口打开
        window.open(key, "_blank");
      } else if (key.indexOf("/redirect") !== -1) {
        // /redirect 路径内部打开
        this.$router.push({ path: key.replace("/redirect", "") });
      } else {
        // 显示左侧联动菜单
        this.activeRoutes(key);
      }
    },
    // 当前激活的路由
    activeRoutes(key) {
      var routes = [];
      if (this.childrenMenus && this.childrenMenus.length > 0) {
        this.childrenMenus.map((item) => {
          if (key == item.parentPath || (key == "index" && "" == item.path)) {
            routes.push(item);
          }
        });
      }
      if(routes.length > 0) {
        this.$store.commit("SET_SIDEBAR_ROUTERS", routes);
      }
      return routes;
    },
    ishttp(url) {
        return url.indexOf('http://') !== -1 || url.indexOf('https://') !== -1
    },
    getTranslatedTitle(route) {
      if (!route.meta || !route.meta.title) {
        return ''
      }
      const title = route.meta.title
      const chinesePattern = /[\u4e00-\u9fa5]/
      // 如果标题不包含中文字符，说明已经是翻译后的，直接返回
      if (!chinesePattern.test(title)) {
        return title
      }
      try {
        // 使用我们之前定义的菜单映射进行翻译
        const menuKeyMap = {
          '更多菜单': 'system.moreMenu',
          '首页': 'system.homepage',
          '系统管理': 'system.systemManagement',
          '系统监控': 'system.systemMonitoring',
          '系统工具': 'system.systemTools',
          '用户管理': 'system.userManagement',
          '角色管理': 'system.roleManagement',
          '菜单管理': 'system.menuManagement',
          '权限管理': 'system.permissionManagement',
          '人员管理': 'system.personnelManagement',
          '字典管理': 'system.dictManagement',
          '参数设置': 'system.configManagement',
          '通知公告': 'system.noticeManagement',
          '日志管理': 'system.logManagement',
          '操作日志': 'system.operationLog',
          '登录日志': 'system.loginLog',
          '在线用户': 'system.onlineUsers',
          '定时任务': 'system.scheduledTasks',
          '数据监控': 'system.dataMonitoring',
          '服务监控': 'system.serviceMonitoring',
          '缓存监控': 'system.cacheMonitoring',
          '表单构建': 'system.formBuilder',
          '代码生成': 'system.codeGeneration',
          '系统接口': 'system.systemInterface',
          '智慧路灯': 'iot.smartStreetLight',
          '灯管理': 'iot.lightManagement',
          '灯杆管理': 'iot.lightPoleManagement',
          '显示屏': 'iot.displayScreen',
          '环境监测': 'iot.environmentMonitor',
          '项目管理': 'iot.projectManagement',
          '版本管理': 'iot.versionManagement',
          '监控列表': 'iot.monitoringList',
          '视频监控': 'iot.videoMonitoring',
          '节目管理': 'iot.programManagement',
          '智慧导览': 'iot.smartNavigation',
          '景点管理': 'iot.scenicSpotManagement',
          '广告管理': 'iot.advertiseManagement',
          '新闻管理': 'iot.newsManagement',
          '景区管理': 'iot.touristManagement',
          '设备列表': 'iot.deviceList',
          '智慧广播': 'iot.smartBroadcast',
          '太阳能灯': 'iot.solarLight',
          '音频设置': 'iot.audioSettings',
          '智慧传感': 'iot.smartSensor',
          '窗口设置': 'iot.windowset',
        }
        const key = menuKeyMap[title]
        if (key && this.$t) {
          const translated = this.$t(key)
          if (translated !== key) {
            return translated
          }
        }
      } catch (error) {
        console.warn('翻译菜单标题失败:', error)
      }
      // 如果翻译失败，返回原标题
      return title
    }
  },
};
</script>
<style lang="scss">
.topmenu-container.el-menu--horizontal > .el-menu-item {
  float: left;
  height: 50px !important;
  line-height: 50px !important;
  color: #999093 !important;
  padding: 0 5px !important;
  margin: 0 10px !important;
}
.topmenu-container.el-menu--horizontal > .el-menu-item.is-active, .el-menu--horizontal > .el-submenu.is-active .el-submenu__title {
  border-bottom: 2px solid #{'var(--theme)'} !important;
  color: #303133;
}
.topmenu-container.el-menu--horizontal > .el-submenu .el-submenu__title {
  float: left;
  height: 50px !important;
  line-height: 50px !important;
  color: #999093 !important;
  padding: 0 5px !important;
  margin: 0 10px !important;
}
</style>
